Drop dispensing vessel



Feb. 18, 1941. A. JUCHLI DROP DISPENSING VESSEL Filed Dec. 23, 1938 Patented Feb. 18, 1941 v UNITED STATES PATENT OFFICE DROP DISPENSING VESSEL Alfred Juchli, Basel, Switzerland, assignor to the firm of Society of Chemical Industry in Basle, Basel, Switzerland Application December 23, 1938, Serial No. 247,498 In Switzerland May 25, 1938 11 Claims. (Cl. 221-148) This invention relates to vessels for delivering Fig. l is a cross-section through a drop disliquids, such as medicaments, flavorings, cospensing bottle closed by its cap. metics and the like, in drops. Fig. 2 is a cross-section through a drop dis- The prior art has produced numerous dropping pensing bottle while being used for discharging bottles which, however, are defective in many liquid. 5 respects. Fig. 3 is a separate cross-sectional view of the It is an object of the present invention to proguide of the bottle illustrated in Fig. 2. vide a drop dispensing bottle that can be handled Fig. 4 is an axial section through the guiding without the need of any particular skill, and tube, and

m which is especially adapted for use by invalids. Fig. 5 shows in cross-section a drop dispensing A further object of this invention is a bottle bottle having an inclined neck. from which liquids may be discharged in drops, More particularly, Fig. 1 shows bottle I having and in which the last drop will not adhere to the an external screw thread 3 on its neck 2 to receive mouth of said bottle. a correspondingly internally screw-threaded clos- 1 Another object of the invention is a bottle ing cap 4 containingadisc-shaped washer 5. The which cann be lo d in the dr p dis gin mouth of the bottle is a comparatively narrow portion by the crystallisation or solidification of tube, preferably enlarged at its upper end and liquid material remaining in the mouth of the serving as a guide 6 for a sliding tube 1. The bottle after the desired amount of liquid has been tube I is longer than the guide 6, but slightly dispensed therefrom. shorter than the height of the bottle, so that, 20

Still another-object of the invention is a pocket when the bottle is closed or stands in an upright bottle for t e d sc e of liq in ps, the position, the tube is entirely contained therein. dis ha n part f whi h sn t p i p The end of the tube, which is in the upper end of .l P u as a be a pp n P the bottle standing in upright position, is chamwhich would make it impossible to close the vessel fered," and the end of the tube, that is placed in 25 securely. the lower end of the bottle, is enlarged to form a Still further objects of the invention will 108- stop 8,which"prevents the tube from slipping out 6. 6 read y parent from the accompanyi of the guide'when the bottle is inverted. This drawing and description. stop 8 can be conveniently provided by heating The new d ppi st pp s app l to the lower end of the tube to redness and letting 3o sels of all kinds and comp s s a Small tube it fall into the bottle whereby the end is enlarged. adapted to Slide With Slight p in guide in the Fig. 2 shows a diiferent embodiment of the inmouthof the vessel, which guide may advantagevention, namely a bottle in which the guide for ous y b so wh t w ed t its per and the sliding tube comprises a separate part which which is adapted to be easily closed. W the is held. in place by asuitable packing, for instance 35 vessel is closed, this tube is in such a position in by a perforated cork or rubber stopper 12, or by the ui that it is co pletely Within the vessel, cementing the'guide in the neck 2 of the bottle. and when the latter is inverted for delivering the Fig. 3 shows a modification of the guide separate liquid, the tube slides in its guide to protrude from the bottle. In Fig. 2 that end of the guide.

40 from the vessel as far as it is permitted by a stop. 9 which is at the upper end of the bottle when in 40 r In this position liquid can flow between the guide upright position is at the same or at the higher and the tube, and down the outer surface of the level as compared with the mouth of the bottle, protruding portion of the tube, finally dropping and is held in position by a flange 10 which rests from the suitably chamfered end to fall in. easily on the packing l2, thereby reenforcing the mouth 5' counted drops. The quantity of air correspondportion of the bottle. The upper end of the guide ing to the liquid delivered flows easily through the preferably is somewhat enlarged. Close to the bore of the tube into the vessel. Afterwards, lower surface of this packing I2 the guide has a when the container is returned to the normal posilateral opening which may be a simple perforation tion; the portion of liquid adhering to the exor a slot I I, extending along the tube to the packterior of the tube returns to the vessel, andthe ing, as shown in Figs. 2 and 3, so that there is no 5 tube slides back into its original position without dead space in the bottle, and that consequently any loss of liquid. the last residue of liquid may be delivered.

" The invention is illustrated by the accompany- Thestop 8 on the sliding tube 1 need not be at jing drawing, whichshows several embodiments of the end thereof. Fig. 4 shows a tube 1 in which the invention. the stop 8' is at some distance from the end of the 55 tube. This modification is suitable especially in a large vessel in order that the tube may not project too far from the vessel when liquid is being delivered and thereby be exposed to danger of breakage. The modification shown'in Fig. 4 also serves the purpose of preventing the layer of liquid above the tube from becoming so high that the air cannot pass into the vessel through the tube. I

Fig. 5 shows a modification of the bottle in which the neck is inclined. Parts I to 5', 1", 8'" and II corresponding to parts I to 5, I, 8 and II of Figs. 1 and 2. The guide 9 illustrated in Fig.

5 is a simple tube cemented into the corrspondis to be withdrawn, the cap 4 or 4 is removed and the vessel is inclined downwardly, 50 that the tube 1 or 1" slides down itsguide 6 or 9 or 9 until checked by the stop 8 or 8". The liquid now flows between the guide and the tube and along the latter until at the chamfered point it forms drops which can be conveniently counted, and does not drop in jerks as is the case with ordinary drop dispensers. At the same time the quantity of air corresponding to the liquid to be withdrawn enters the bottle through the tube 1 or 1" so that uniform delivery-from the bottle is assured. The last residue of the liquid in the bottle can fiow through .the space between the guide and the tube, and the bottle can be completely emptied. When the desired dose has been measured from the bottle, the latter is brought again into upright position whereupon the tube 1 or 1" slides back into the bottle and. completely disappears in the guidev 9 or 9 so that no breakable portion remains projecting. The liquid still adhering to the dropping device returns to the tube as the latter slides back from the bottle, thereby avoiding stickiness or crusts. This feature is aided by the slight enlargement of the guide at its upper end.

The modification illustrated in Fig. 5 shows a suitable application of the operation out-lined above to a bottle the neck of which is at an angle to the longitudinal axis of the bottle. The sliding tube 1" is inclined and held by the guide 9' against the inside of the bottle. This form of dropping vessel is more convenient to handle, since it is not necessary to tilt it at as great an angle as is the case with an ordinary bottle from which liquid is withdrawn. a v

' The speed of delivery of the drops is easily adjustable by the amount of play permitted between the guide and thesliding tube; The greater this amount of play the greater the speed of delivery, andfvice versa, A suitable choice of the amount of play also adapts the drop dispensing device for liquids of various viscosities.

What I claim is:

1. A drop dispensing vessel comprising a tube and a container with a-t-ubular neck providing a single tube-like delivery opening, whichserves as'a guide for the tube adapted to slide within said guide, said tube having an oblique outer end and being provided with a stop interiorly of said outer end and being of suflicient length to remain in engagement with said guide when the vessel is in upright position.

2. A drop dispensing vessel comprising a tube and a container with a tubular neck providing a single tube-like delivery opening, which is enlarged at the outer end of the neck and which serves as a guide for the tube adapted to slide within said guide, said tube having an oblique outer end and being provided with a stop interiorly of said outer end and being of sufficient length to remain in engagement with said guide when the vessel is in upright position.

3. A drop dispensing vessel comprising a tube and a container with a guide fixed by a packing in the neck of the vessel, having a flange covering said packing and providing a single tube-like delivery opening which is enlarged at the outer end and serving as a guide for the tube adapted to slide within said guide, said tube having an oblique outer end and being provided witha stop interiorly of said outer end and being of .sufl'lcient length to remain in engagement with said guide when the vessel is in upright position.

4. A drop dispensing vessel comprisinga tube and a container with a guide fixed by a packing in the neck of the vessel having a flangecovering said packing and providing a single tube-like delivery opening which is enlarged at' the outer end and having a lateral opening ,close' to the lower surface of said packing and serving as a guide for the tube adapted to slide within said guide, said'tube having an oblique outer' end and being provided with a stopinteriorly of said outer end and being of sufficient length to remain in" engagement with said guide when the vessel'is in upright position. I

5. A drop dispensing vessel comprising a tube and a container with a tubular neck providinga single tube-like delivery opening, which. is enlarged at the outer end of the 'neck and which serves as a guide for the tube adapted to slide within said guide, said tube having a stop at its lower end and having an oblique outer end and being of suflicient length to remain in engage-' ment with said guide when the vessel is in upright position. I I I 6. A drop dispensing vessel comprising a tube and. a container with a'guidefixed by a packing ing said packing, and providing a single tubelike delivery opening which. is enlarged at the outer end and serving as a guide for the'tube .50 in the neck of the vessel, having afiange coveradapted to slide within said guide, said tube hav- I55 ing .a stop 'at its lower end and having an oblique outer end and being .ofsuincient length to remain in engagement with said guide when the vessel is in upright position.

7. A drop dispensing vessel comprising a tube 0 and a container with a guide fixed by a packing in the neck of the vessel, having a flange covering said packing and providing a single tubelike delivery opening which'is enlarged at the outer end and having a lateral'opening close to 65 the lower surface of said packing and serving as a guide for the tube adapted to slide within said guide, said tube having a stop at its "lower end and having an oblique outer end and 'beingflof sufiicient length to remain in engagement with larged at the outer .end of the neck andwhich 15 serves as a guide for the tube adapted to slide within said guide, said tube having a stop between its upper and lower end and having an oblique outer end and being of sufiicient length to remain in engagement with said guide when the vessel is in upright position.

9. A drop dispensing vessel comprising a tube and a container with a guide, fixed by a packing in the neck of the vessel, having a flange covering said packing and providing a single tube-like delivery opening which is enlarged at the outer end and serving as a guide for the tube adapted to slide within said guide, said tube having a stop between its upper and lower end and having an oblique outer end and being of sufficient length to remain in engagement with said guide when the vessel is in upright position.

10. A drop dispensing vessel comprising a tube and a container with a guide fixed by a packing in the neck of the vessel, having a flange covering said packing and providing a single tube-like delivery opening which is enlarged at the outer end and having a lateral opening close to the lower surface of said packing and serving as a guide for the tube adapted to slide within said guide, said tube having a stop between its upper and lower end and having an oblique outer end and being of sufficient length to remain in engagement with said guide when the vessel is in upright position.

11. A drop dispensing vessel comprising a tube and a container with an inclined tubular neck being at an oblique angle to the longitudinal axis of said container and providing a single tubelike delivery opening, which is enlarged at the outer end which serves as a guide for the tube adapted to slide within said guide, said tube having a stop in the interior and having an oblique outer end and being of sufi'icient length to remain in engagement with said guide when the vessel is in upright position.

ALFRED JUCHLI. 

